Solar air drying device

The utility model discloses a solar air drying device which comprises a solar vacuum tube air heat collector used for heating air, a first air inlet and a first air outlet which are formed in the twoends of the solar vacuum tube air heat collector respectively. A second air inlet and a second air outlet are respectively formed in two ends of the air drying box; the air inlet pipeline is connectedwith the first air outlet and the second air inlet and used for allowing air to flow to the air drying box from the solar vacuum tube air heat collector; the air outlet pipeline is connected with thesecond air outlet and the first air inlet and used for allowing air to flow back to the solar vacuum tube air heat collector from the air drying box, and the air outlet pipeline is filled with a water absorbing material; and the plurality of variable-frequency air supply devices are used for enabling air to flow towards a specified direction and are respectively arranged in the air inlet pipelineand the air outlet pipeline